I shopped around a bit for the check engine light I had on that was related to an evap system leak. The other shop wanted $96 for the diagnostic alone. Pep boys charged me $45 for the diagnostic and when they'd found the issue they called me up and asked if I wanted it repaired. Since I did get it repaired they rolled that $45 charge into the payment for the repair. They gave me a quote over the phone and when I went to pick up the vehicle the actual charge was $4 less. Its not a whole lot of a difference, but at least it was in my favor.
I found the customer service here to be especially good. All of the staff was very friendly. There was sometimes a wait for service but nothing out of the ordinary for an auto parts store or an auto service shop.